Toshiba AC100

[jagoterr]

Hello. Please, help me with my problem, I'm fully stuck with it.

1. Starting point: Android 2.2.
2. Ubuntu 11.10 installed according to https://wiki.ubuntu.com/ARM/TEGRA/AC100
3. Everything worked ok, but I wish to use Arch.
4. Restored a device into it's initial state by the set of `nvflash -r -rawdevicewrite ...`. After that, Android loads and works perfectly.
5. I flash a kernel (tried both: boot-marvin24s-2.6.38-dc61519.p12.img and boot-marvin24s-2.6.38-dc61519.img, but I own ac100-117).
6. The boot process falls into BusyBox shell. BusyBox version is smth like 1.18.*ubuntu*. I don't know, if it is an after-effect of the Ubuntu installation, or it is a part of the device. No ideas.
7. I can mount /dev/sda1 from the busybox-shell, it is fully readable.
8. Where is my fail???

[macau]

u can mount /dev/mmcblk0p7 with ubuntu and sda1 with arch rootfs from busybox, then rm ubuntu files and copy arch files with keeping permissions. its obviously, блеять!

[eyahn]

Hi there everyone! Im having trouble installing Arch!
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')3. unpack http://archlinuxarm.org/os/ArchLinuxARM ... est.tar.gz to your new partition
4. unpack http://avolver.ru/ac100/kernels/38.ogra ... 1.1.tar.gz in to your rootfs partition(check path for modules- /lib/modules/2.6.38-blahbalah)
5. change rootfs mount point in your fstab (/dev/sdx for usb stick, /dev/mmcblk1px for sdcard and /dev/mmcblk0p7 for internal storage)

[eyahn]

Ok, i'm almost there!
I unpacked http://archlinuxarm.org/os/ArchLinuxARM-omap-smp-latest.tar.gz as rootfs. Now it says that my filesystem is mounted read-only. It gives me several boot [FAIL]s, all with permission reasons. I guess that makes sense. I will try and copy my sdcard to internal [...]p7, right?

edit: i used http://avolver.ru/ac100/kernels/38.dc61519-7Oct11/boot-marvin24s-2.6.38-dc61519.SD.img to boot from SD. May it be the cause of read-only file system? Using the "non-SD" version of .img it kept asking me for /modules.dep, which i can't find in modules.tar.gz.

[jideel]

Once the system has booted, run 'depmod -a' as root.
It doesn't fix the "modules.dep" message during the boot, but generates the file modules.dep, and the next boot all the required modules will be loaded.

[DDevine]

I managed to get Arch running off a SD card without much trouble. Now I am trying to install to the eMMC.

If the standard Android partitions were left intact by the previous owner this would probably be easy because I could just use a standard TEGRAPART= kernel parameter. Now I am attempting to build up my tegrapart line by hand using the information I got from the partition table backup...

I assume that if I can reverse engineer the tegrapart parameters I should be able to then modify one of marvin's boot images using abootimg - which will result in the internal partitions being available when I boot fom SD card and then I can install the rootfs+modules. Am I right?

By converting my partition table dump to the tegrapart scheme I came up with the following:
The scheme is name:offset:length:blocksize so...

bct:0:600:800,
pt:600:100:800,
ebt:700:400:800,
mbr:b00:a00:800,
lnx:1500:8000:800,
rt:9500:e4e200:800,
swp:e57700:e7f00:800

But since we don't need every partition:
tegraboot=mbr:b00:a00:800,lnx:1500:8000:800,rt:9500:e4e200:800,swp:e57700:e7f00:800

lnx is is the boot partition and rt for the rootfs and swp is obviously swap. The previous owner set these up.

Update: These don't seem to work at all. In dmesg it indicates that it has found some partitions but when it tries to parse the mbr it fails. I don't understand exactly why it fails yet.

Update: I just pulled the MBR position out of the tutorial the previous owner was likely to have followed. It worked and the rest of the partitions were detected automagically from there...
I still don't understand where I went wrong in trying to reverse engineer from the partition table dump. If somebody knows the answer that'd be great (and I'll make sure it is documented somewhere more public).

[DDevine]

I compiled marvin's a 3.0.13 kernel and I noticed a considerable speed increase!
It does seem to crash every now and again, but so did the 2.6.38 kernel.

Soon I will post a tutorial on how to get, build and install marvin's 3.0 kernel. He is looking for more testers so we'd better comply

I have Arch installed on the internal storage and sound (out the speakers at least) working. I just need suspend and resume... I'm trying to find that snippet which showed how to trigger a sleep by via sysctl...

[apertu]

DDevine, can you please also post tutorial on how to get arch running on internal storage (what rootfs you used, etc)?

[macau]

update: preinstalled version aviable!

[flyaway]

Hi there!

http://ac100.grandou.net/archlinux
Archlinux install instruction for Toshiba AC100.